For angle ...X... the projectile has maximum range and it is equal ...

For angle ...X... the projectile has maximum range and it is equal to ...Y... Here, X and Y refer to

A. \(\frac{\pi}{4}\) and \(\frac{u^2}{2g}\)

B. \(\frac{\pi}{2}\) and \(\frac{u^2}{g}\)

C. \(\frac{\pi}{4}\) and \(\frac{u^2}{g}\)

D. \(\frac{\pi}{2}\) and \(\frac{u^2}{2g}\)